Rock-drill.



W. A. SMITH.

ROCK DRILL.

Patented Feb. 11, 1919.-

APPLiCATlON FILED JULY 23. 19|?. 31,293,961.

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WILLIAM A SMITH, QF'DENVEB, GGLGEAIJ, ASSGNR T0 THE EENVEZX: dtli MANUFCTUBETG' CGMPNY; F DENVER, CDLGRAD, A QRPRAG' DELA- WARE.

Patented Feelin iii, lilll.,

Original application filed Becember '3.8, mit, Serial No. 37,333. Divided and this smilies-tion :led 31113/ `23:-,

Serial i'o. il.

.To all whom t may concern:

Be it known that I, Winnmir A... Smm, a, citizen ofthe United States, residing; at Denver, in the county of Denver and State oColorado, have invented certain new' and useful Improvements in Rock-Drills, of which the following` is a speciiioation.

The present invention relates more particularly to rock drills of the hammer piston type, this application being a division oi' Serial No. 137,363, filed December i6, i916.

The primary object of the invention is to provide novel mechanism of a simple and practical character for delivering cleansing fluid to the drill bit, Said means 'being under the constant control ci the operator, and furthermore coactingwith the means for ,governing the supply of motive iiuid to the drilling motor.. v

In the accompanying drawings,

Figure 1 is a longitudinal sectional view of a structure ernbodying the present inn vention.

Fig. 2 is a detail sectional view on an enlarged scale of the cleansing luid controlling means.

Similar reference numerals designate correspondingr parts in all the g'ures oi the drawings. j

In the embodiment-illustrated the motor consists of a barrel or cylinder member 3, within which reciprocates a piston @e having an extension 5 of vless diameter than die piston proper.' Thisypiston is ci the type, the extension 5 operating on a drill hit 6 detachably' located in a rotatable chuck l and having a rbore 8 therethrough, said here providing` means for conducting' cleansing fluid to the lloottonu of the drill hole. rihe drilling motor is ci' the so-called valveless type, fthe piston constituting the means igor controlling' the distribution oij the motive fluid to actuate said piston.

It is believed to be' unnecessary for the purposes of the present inventionto go into a detailed description of the motor, as the same is fully disclosed in the shove iden ilied application. It is sufficient to Isay that this motive fluid, is supplied to the' piston chamber by apassageway 9 leadingg to ports and channels controlled by the piston hammer. The exhaust takes piace throughjiu jpassagevvayy l0 having ports li alternately covered and uncovered. by the ends of the piston upon its reciproeation.

For the purpose of supplying motive fluid llLCllU der memier, the piston Foei `1; hollowed out,

i6, to accommodate said exas shown at tension.

Slide bly mounted in the rear head and in the socket of the extension 15 is a tuloular neck 17 which carries a handle 18. The handle is provided With a lateral inlet passageway 194 to which may loe coupled the communication With the bore il@ of the neck 17, which neck `has its inner end open, and is thus in communication with the socket oi the extension l5. The said neck furthermore is provided with a lateral port 2l that is mov-able into 'communication with the passageway il when the handle is moved t0- ward the motor, said vport being closed when the handle is in its outermost position. It `will thus he seen that when the handle is pushed forward tue port 21 will be brought into communication with the passageway 14:, so motive fluid supplied to the passage way 19 will into the motor to operate the same.

The piston hammer 'i and its extension is provided with a longitudinal axial bore 22 alined and communicating' with the 'bore 8 of the drill feit. Fluid under pressure is delivered to the llore 22 and consequently to the here 8 means 'of a conducting tube 23, rear end of which is slidahly mounted the handle i8, said tube passing through the nbore 550 oi the neck i? into the bore The* tuile has a rear closed end and is provided with a lateral port S/i that is mov# able into and out oi communication with the duid supply passage i99 accordingly as the tube is moved forwardly and backwardly in the handle member. The mounting for this tute includes `a plus; .25 through which said todos slidehly passes and against which itis usual hose line, and this passageway is in arranged toa-but to limit its outward movement. The 'rear end of the tufbe is -provided with a thumb or finger piece 26 arrangedV within the Vhandle in convenient relation to be pressed upon by the operator, and a spring 27 is interposed'between the lin er piece and the plug 25,-this spring as will e evident, holdingr the tube in its rearmost po.-

sition, with the port :24 'thereof out of communication withy 'the passageway` 19.-

4When the handle is pressed forwardly,

` the tube will, ofcourse move 'forwardly with 'ift and motive fluid, as already explained,

will be delivered to. the` drilling motor. Whemthe tube 23 is pressed with-respect to the handla'the'port 24 therein is brought into communication with the passageway 19, and consequently fluid under pressure can enter the tube 23 and discharging from the 22 into the bore 8 of the drill bit;

The operation of this tube is not depend- :front end thereof will pass through the bore lent at all upon themanipulation of the v handle. That is to say, the cleansing fluid can be caused to flow into the drill bit irrespective of-the position of the handle, and

whetheror notvit is in a position to deliver motive fluidto the drilling motor.

From the foregoing, it is thought that the construct-ion, operation and many advantages of thel herein described .invention will be a parent to those skilled'in the art, With-f out t rther description, and it 4will be under- Vstood that various changes in the size, shape,

proportion and minor details of construction, may be resorted to without departing -Afrom the spirit or sacrificing any of the ad- -vantages .of ythe invention. l

Havin thus fully described my invention,

,what I c aim as new, and desire to secure by LetterslPatent, is

1. In drilling apparatus, the combination with a motor comprising a cylinder member and a piston operating therein and having a bore, ofl a cleansin fluid directing tube projecting into the cy inder member and engaged in the bore of the piston, said piston bein slidable on the tube, and said tube being s idablein the piston, and means for supplying cleansing fluid to the tube, said supply being controlled i'ng movement. y l

2. In drillingapparatus, the combination with a motor comprising a cylinder member and a piston operating therein and having a bore, of means for supplying motive fluid to the motor, and a cleansing fluid directing tube projecting into the cylinder membythe tube on its slidfber and engaged in the bore of the piston, said piston being slidable on the tube, and said tube being slidable in the piston and furthermore havin communication y with the motive fluid supp y means to divert a partthereof for cleansing 'purposes when said tube is in one position and being out of therein for directin communication with the motive fluid supply means when the tube is in another position.

3. In drilling apparatus, the combination with a motor comprising acylinder member and a piston operatin therein and having a bore, of means including a passageway at the rear portion of the cylinder member for supplying motive iluid thereto to operate the into the passageway and into the boi-e o the piston and being slidable therein, said tube having a port movable into and out of communication p1ston,land a tube extendin with the supply passageway upon its sliding movement.

41.-In drilling apparatus, the combination with a motor, of a' tube movably mounted motive fluid to a drill bitoperated on by t e motor, one end of said tube pro'ecting toward such drill bit, the other en being exposed and constituting an actuating device for moving it, said tubeby its movement controlling the supply of cleansing fluid directed thereby.

5. In drilling apparatus, the combination with a motor comprising a cylinder member and a. piston operating therein and having 8. bore, of means for supplying motive fluid to the motor, i`ncluding a assageway at the rear of the same,y and a fluid conductin tube slidably mounted in the motor and slidably 'extending into'the 'bore of the piston, the -rear end of the tube being disposed in projecting relation and constituting means for sliding said tube, `said tube having a port that is movable into and out of `communication with the passageway upon the sliding movementof the tube.

6. In drilling apparatus, the combination .with a motor, comprising a cylinder member and a piston o erating thereon, of a handle member carrie by the rear end of thecylinder member., a cleansing fluid supply tube slidably mounted in the handle member and Vhaving a ro'ecting linger piece foroperating it, sai tu e extending into the piston for directin cleansing fluid to a drill bit operated on y said piston, and said tube furthermore havin a port located in the handle member, an a supply passage in said handle .member with which the port moves into and out of communication upon the sliding ated onby lthe motor, includingmeans mova- -blyfmounted on the throttle valvevfor controllingv asupply of cleansing fluid. 9.In drilling apparatus, the combination with a drilling motor, of means orsupplying motive fluid to the motor, a handle for holding the' motor tov its work movably mounted on-said motor and having a throttle valve movable therewith for controlling the supply of actuating fluid to the motor,

and means mounted on and movable with said handle for delivering cleansing fluid to the drill'bit.

10'. In drilling apparatus, the combination with a drilling motor, of means for supplying motive u'id to the motor, a throttle ,"lve controlling such supply, and a @be 'mounted onthe throttle forsupplying lcleansing fluid to a drill bit operated on by the motor, said tube being valve.

11. In drilling apparatus; the combination with a drilling motor including a cylinder member: and a piston therein having a bore therethrough, a handle slidably mounted on the cylinder member and having a throttle valve movable therewith to control the supply of motive fluid to the drilling moftor, and a tube slidably mounted on the liandle and engaging in the bore of the piston,

said tube having a valve portion movable' WILLIAM A. SMITH..

,Witnessesz C. F. CHAMBERS, J. P. FLYNN. 

